How did Imam Khomeini categorize various types of knowledge?

Imam Khomeini's exposition of Forty ahadith range broad area of ethical and spiritual topics

Imam Khomeini's selection and exposition of Forty ahadith range over a broad area of Islamic philosophy, ideology, ethics, metaphysics and spirituality.

Ethics has a special place in Imam Khomeini's way of thinking

In the heart of Imam Khomeini's way of thinking, ethics has a [special] place, and in fact, all areas of knowledge revolve around this pivot.

Imam Khomeini's famous book "Forty Hadith" includes range of discussions

Imam Khomeini's selection and exposition of Forty ahadith that range over a broad area of Islamic philosophy, ideology, ethics, metaphysics and spirituality.

Faith, which is fortune of the soul, is different from knowledge, Imam Khomeini explained

Imam Khomeini through his theological and mystical works explains that faith, which is the joy and fortune of the soul, is different from knowledge, which is the pleasure and satisfaction of the intellect.

Man by nature is a lover of justice, Imam Khomeini elucidated

Imam Khomeini through his theological works explained that modesty and reverence before justice and hatred and rebellion before injustice are rooted in his nature.

What are some of important discussions Imam included in his famous work “Forty Hadith”?

Comparative Study of the Concept of Justice in Imam Khomeini and Sayyid Qutb’s Political Thought.